Because discovery is such a big part of the appeal, many players prefer lobbies that categorize games by theme, volatility, and features like expanding wilds, buybonus functionality, or cluster pays
I can actually see this going into a lot of decks as a meta call
This is much like the original Secret cards in Pokmon sets
I've always loved swords like Sword of Feast and Famine, Sword of Body and Mind, and Sword of Fire and Ice, but more recently I've wanted to condense that three-mana slot into just one sword
Unless you're really late into the game against very powerful enemies and have a high enough HP pool to take brutal hits, you're only getting a pittance of gil from this skill, while money is very easy to come by just by winning battles, especially at the point in the game where you could be getting an amount of gil from Gilgame Heart that isn't laughable
The deck is easy to play for beginners and has a solid amount of depth for experienced TCG players